As the years roll by, I've started to like this plate more and more, although when it came out in 1990, it was a bit of a disappointment to me.
I liked the "Back Home Again" plate, and this one, I thought, was a bit too plain. But it's grown on me.
By this point, the dies that had been in use since the mid-'50s were starting to wear out, so other sets were used at various times. If you look closely, you'll see that each of these three plates uses a different die set.
Where they came from:
1991: Vanderburgh County
1992: Hamilton County
1993: Spencer County (Mom's plate again; this one was also used on the '90 Grand Voyager)